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57 lines
2.3 KiB
57 lines
2.3 KiB
# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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r""" |
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A example workflow for task condition. |
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This example will create five task in single workflow, with four shell task and one condition task. Task |
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condition have one upstream which we declare explicit with syntax `parent >> condition`, and three downstream |
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automatically set dependence by condition task by passing parameter `condition`. The graph of this workflow |
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like: |
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pre_task_1 -> -> success_branch |
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\ / |
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pre_task_2 -> -> conditions -> |
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/ \ |
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pre_task_3 -> -> fail_branch |
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. |
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""" |
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from pydolphinscheduler.core.process_definition import ProcessDefinition |
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from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Conditions |
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from pydolphinscheduler.tasks.shell import Shell |
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with ProcessDefinition(name="task_conditions_example", tenant="tenant_exists") as pd: |
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pre_task_1 = Shell(name="pre_task_1", command="echo pre_task_1") |
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pre_task_2 = Shell(name="pre_task_2", command="echo pre_task_2") |
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pre_task_3 = Shell(name="pre_task_3", command="echo pre_task_3") |
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cond_operator = And( |
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And( |
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SUCCESS(pre_task_1, pre_task_2), |
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FAILURE(pre_task_3), |
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), |
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) |
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success_branch = Shell(name="success_branch", command="echo success_branch") |
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fail_branch = Shell(name="fail_branch", command="echo fail_branch") |
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condition = Conditions( |
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name="conditions", |
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condition=cond_operator, |
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success_task=success_branch, |
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failed_task=fail_branch, |
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) |
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pd.submit()
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